A former youth pastor at a conservative Mesquite church accused of raping a teenager for more than a year pleaded guilty Friday in Dallas County to three counts of sexual assault of a child.

Steven Aaron Winn

(Dallas County Sheriff's Department)

Steven Aaron Winn, 34, was sentenced to four years on each count as part of a plea deal, with the prison terms to run concurrently. He had faced up to 20 years behind bars on each count.

He will have to register as a sex offender upon his release.

Winn, a Crandall resident, was an assistant youth pastor at Open Door Baptist Church on South Belt Line Road. Police arrested him in February 2018 after learning that he'd been in a sexual relationship with the victim — a student at the church's Christian academy — for more than a year, starting when she was 15.

Church officials have previously said that Winn was a volunteer at the church, not an employee. No one at could be reached for comment at the church Friday.

Winn still faces one count of sexual assault of a child in Kaufman County. He was indicted on the charge last month, court records show.